JPH0216178Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a hot water heating system using a bath reheating device.

(Prior Art and Problems) Conventionally, there is a method disclosed in Japanese Utility Model Application Laid-Open No. 60-48013 that connects a bathtub and a radiator in parallel.
On the other hand, the heating circuit is usually provided with an expansion tank that is open to the atmosphere. However, if a bathtub and a radiator are connected in parallel to a heat source device with a built-in expansion tank, if the bathtub is installed on the second floor, switching to the bath circuit will cause the bathtub water to flow backwards and overflow from the expansion tank. It was unusable.

The present invention eliminates the above-mentioned conventional drawbacks, and aims to provide a system that can be used with any piping pattern and prevents air from entering the bath circuit.

(Example) 1 has a built-in pump and heater (not shown),
The expansion tank, which is open to the atmosphere, is a reheating device that does not have a built-in structure, and a bathtub 2 installed on the second floor and two pipes, an outgoing pipe 3 and a return pipe 4, constitute a forced circulation bath circuit. 5 is a radiator, an outgoing pipe 6 and a return pipe 7
is connected in parallel to the bath circuit to form a heating circuit. 8 is an air separator provided in the return pipe 7 of the heating circuit, the upper part of which is connected to the lower part of the buffer tank 9. A return pipe 4 of a bath circuit is connected to the upper part of the buffer tank 9. 10 is a valve provided on the outgoing pipe 3 of the bath circuit, and 11 is a valve provided on the return pipe 7 of the heating circuit, and the circuits are switched by reversing the opening and closing of both valves.

In addition, in the bath circuit, the valve 10 must be provided only in the outgoing pipe 3, but in the heating circuit, the valve 11 may be provided in either the outgoing pipe 6 or the return pipe 7.

Next, the operation of this configuration will be explained. When heating the bath, the bathtub 2 is filled with water, the valve 10 is opened, and the reheating device 1 is activated. Then, the bathtub water is circulated along the path of bathtub 2 → buffer tank 9 → air separator 8 → reheating device 1 → bathtub 2, and is heated. On the other hand, when performing heating, if the valve 11 is opened and the reheating device 1 is activated, the water for heating is transferred from the radiator 5 to the air separator 8 to the reheating device 1.
→It is circulated through the path of the radiator 5 and heating can be performed. When the heating water expands during heating, the expanded water flows from the buffer tank 9 above the air separator 8 to the return pipe 4.
The air separated in the air separator 8 is also discharged into the bathtub 2. In other words, the bathtub 2 becomes an expansion tank open to the atmosphere. This also applies when the bathtub 2' is located below the air separator 8.

Furthermore, if the bathtub 2 is located on the first floor and is lower than the air separator 8, when the water in the bathtub 2 is drained, the water in the bathtub pipe 3 and the bath return pipe 4 will also be drained, but the bathtub return pipe 4 is located above the bathtub tank 9. Since the air that is replaced with water is connected to the buffer tank 9,
It doesn't come inside. Therefore, the heating circuit below the buffer tank 9 is always filled with water, and there is no problem with the use of the radiator.

Note that instead of the valves 10 and 11, a three-way valve may be provided at the connection point of the outgoing pipes 3 and 6 of both circuits.

(Effects of the invention) As described above, the present invention has a heating device that is open to the atmosphere and does not have a built-in expansion tank, in which a bathtub and a radiator are connected in parallel. Because of this, the only part of the circuit that is open to the atmosphere is the bathtub, and during heating, the bathtub functions as an expansion tank via the return pipe of the bathtub circuit, so the location of the bathtub does not have any effect. In other words, even if the bathtub is installed on the second floor, there will be no backflow of water in the bathtub.

In addition, since the top of the bathtub tank is connected to the return pipe of the bath circuit, water from the heating circuit will not be drained even if the bathtub is installed on the first floor, so any piping pattern can be used. be.

[Brief explanation of the drawing]

The drawing is a schematic diagram of an embodiment of the present invention. 1... Reheating device, 2... Bathtub, 3... Outgoing pipe,
4...Return pipe, 5...Radiator, 6...Outgoing pipe, 7
... Return pipe, 8 ... Air separator, 9 ... Buffer tank, 10 ... Valve.

Claims (1)

[Scope of utility model registration request] A heating circuit is configured by connecting a reheating device that includes a pump and a heater but does not include an expansion tank that is open to the atmosphere, and a radiator through an outflow pipe and a return pipe, and
In a hot water heating system in which a radiator and a bathtub are connected in parallel to form a bath circuit between the heating device, the bath circuit is provided with a circuit switching valve only on the outgoing pipe, and the return pipe of the heating circuit is provided with a valve for switching the circuit. A hot water heating device characterized in that an air separator is provided in the pipe, a buffer tank is provided in communication with the upper part of the air separator, and the upper part of the buffer tank is connected to a return pipe of a bath circuit.